Wireless charger system for battery pack solution and controlling method thereof

ABSTRACT

A wireless charger system for a battery pack is disclosed. The wireless charger system in one exemplary embodiment may include a wireless charger apparatus for receiving an external power source to transmit a power signal via a charging power transmitter block and a battery pack for receiving a power signal from the wireless charger apparatus to charge power in a battery cell and supplying a power source to a portable terminal block. The wireless charger apparatus may also have an outer body composed of a resonant converter for supplying power to the battery pack and a wireless charger case having a central controller installed inside. The wireless charger case may have a protruded round portion formed around the rear edge and a display block provided as the sloped surface in the front portion thereof.

TECHNICAL FIELD

The present invention relates to a wireless charger system, and moreparticularly to a wireless charger system for a battery pack solutionthat is provided so that a wireless charger system composed of awireless charger apparatus and a battery pack can supply a power sourceto a portable terminal block through the wireless power transmission.

BACKGROUND ART

In general, a battery pack functions to supply a power source of aportable terminal block, and is composed of a battery cell for storingelectricity; and a charging circuit for charging and supplying theelectricity.

As a charger for charging electricity in a battery pack for thisportable terminal block, there is a terminal supply system in whichelectricity is received from a conventional power source and a powersource is supplied to a battery pack via a power supply terminal.However, where the battery pack is attached/detached to/from the chargerwhen a power source is supplied to this terminal supply system, aninstant discharge phenomenon occurs due to the different potentialdifference of terminals disposed in both sides of the battery pack.Therefore, the battery pack has an increasing possibility to start firesas foreign substances are accumulated in the terminals. Also, the lifespan and performances of the charger and the battery pack may bedeteriorated, for example spontaneous discharging in the presence ofmoisture.

In order to solve these problems regarding the terminal supply system,there has been developed a wireless charger. That is to say, thiswireless charger is charged by a secondary coil inside the battery packwhen a portable terminal block having a battery pack mounted inside isdisposed upwardly in a primary coil of wireless charger. That is to say,electricity induced from an induced electromotive force is charged inthe secondary coil by means of the magnetic field generated in theprimary coil.

However, these conventional wireless chargers have no practical usesince it is possible only to supply a power to a portable terminalblock, but they have difficulty in use for other applications.

In particular, the conventional wireless chargers have problems that itis impossible to determine a charging level since they have noadditional indicator, and it is also difficult to determine a state ofthe wireless chargers since a user does not discriminate a respectivestate in the charging level.

Furthermore, the wireless charger may be damaged due to the increasedloss of power in the primary coil when metals are disposed adjacent tothe magnetic field generated in the primary coil.

DISCLOSURE Technical Problem

Accordingly, the present invention is designed to solve such drawbacksof the prior art, and therefore an object of the present invention is toprovide a wireless charger system for a battery pack solution that isprovided so that a wireless charger system composed of a wirelesscharger apparatus and a battery pack can supply a power source to aportable terminal block through the wireless power transmission, whereinan input power such as a power for computers and notebook computersusing a USB port, an external power used as a power outlet, a mobilepower used as a cigar connection port in vehicles is easily supplied toa portable terminal block.

Also, another object of the present invention is to provide a wirelesscharger system capable of easily checking an operation state of thewireless power charging system from a display index of a display blockin the wireless charger apparatus.

Technical Solution

According to an aspect of the present invention, there is provided awireless charger system for battery pack solution including a wirelesscharger apparatus 10 for receiving a power source from the outside totransmit a power signal via a charging power transmitter block 15 in awireless mode; and a battery pack 20 for receiving a power signal fromthe wireless charger apparatus 10 in a wireless mode to charge power ina battery cell and supplying a power source to a portable terminal block30, wherein the wireless charger apparatus 10 has an outer body composedof a resonant converter for supplying power to the battery pack and awireless charger case 101 having a central controller installed inside;the wireless charger case 101 has a protruded round portion 102 formedaround the rear edge and a display block 19 provided as a slop surfacein the front portion 103 thereof; an a flat surface is formed betweenthe protruded round portion 102 and the front portion 103 and a batterypack positioning block 104 formed therein, the battery pack positioningblock 104 having a lower height than the protruded round portion 102 andthe front portion 103; and a primary core block 151 for transmittingpower supplied to the battery pack 20 is installed inside the batterypack positioning block 104 to supply power to the battery pack 20disposed on the battery pack positioning block 104.

In this case, the wireless charger apparatus 10 may include a powerreceiver block 12 for receiving a power source from the outside; aresonant converter 14 for converting an output signal including a powersignal and a data signal supplied from the power receiver block 12, andtransmitting the converted output signal to a charging power transmitterblock 15 provided with a primary core block 151; a gate driver 13coupled to the power receiver block 12 to transmit an output signalincluding a data signal and a power signal to the resonant converter 14,the gate driver being controlled by the central controller 11 andprovided with a bootstrap gate drive; a current detector block 16coupled between the power receiver block 12 and the resonant converter14 to detect a data signal of the battery pack 20 through thetransmission operation by means of the primary core block 151; a centralcontroller 11 for controlling the power receiver block 12, the resonantconverter 14, the gate driver 13 and the current detector block 16; anda display block 19 for displaying a state of the wireless chargerapparatus 10 according to the control signal of the central controller11.

Here, the battery pack 20 may include a secondary rectification circuitblock 22 for converting a power that is induced through a secondary coreblock 21 by an induced magnetic field generated by a primary core block151 of the wireless charger apparatus 10; a battery pack controller 24coupled to the secondary rectification circuit block 22 to supply acharging power to a battery cell 23, to process datatransmitted/received by the primary core block 151 and the secondarycore block 21 and to transmit data signals for a charging state of thebattery pack 20, an erroneous state of the battery pack 20 and a nativeID signal value; a battery pack charging circuit block 25 for supplyingpower to the battery cell 23, the power being supplied from thesecondary rectification circuit block 22 under the control of thebattery pack controller 24, and supplying a power of the battery cell 23to the portable terminal block 30; a data input/output block 26 fortransmitting/receiving data to/from a portable terminal block 30 underthe control of the battery pack controller 24 relative to the datatransmitted/received to/from the wireless charger apparatus 10, andprocessing the data; and a charge monitoring circuit block 27 forchecking a charging level of the battery cell 23 and transmitting afully-charged or discharged signal to the battery pack controller 24.

Also, the secondary core block 21 may have a core formed in a shapeselected from the group consisting of a round shape, a rectangularshape, an oval shape and a polygonal shape; the battery pack 20 may beattachable/detachable to/from the portable terminal block 30 and mayhave an all-in-one hard pack shape in which a power source stored in thebattery cell 23 is connected to a terminal block 28; the secondary coreblock 21 may be formed integrally in the rear of the portable terminalblock and may have a built-in shape in which a circuit configuration ofthe battery pack 20 is configured inside the portable terminal block 30together, or the battery cell 23 may be formed in the battery pack 20and may have a battery pack charging circuit block 34 coupled throughthe terminal block 28, the battery pack charging circuit block 34 beingprovided inside the portable terminal block 30.

In particular, the display block 19 may include a display signalreceiver block 191 for receiving a control signal transmitted from thecentral controller 11; a light emitting diode (LED) 192, a liquidcrystal display (LCD) panel 193 and an icon LCD 194, all of which arecoupled to the display signal receiver block 191 to be turned onaccording to the control signal transmitted from the central controller11; an LED driver 195 coupled to the display signal receiver block 191to turn on the LED 192 according to the control signal transmitted fromthe central controller 11; an LCD panel driver 196 coupled to thedisplay signal receiver block 191 to turn on the LCD panel 193 accordingto the control signal transmitted from the central controller 11; and anicon LCD driver 197 coupled to the display signal receiver block 191 toturn on the icon LCD 194 according to the control signal transmittedfrom the central controller 11.

Furthermore, the LED 192 may emit light with a green or red color, theLCD panel 193 may emit light with a blue or green color, the icon LCD194 may emit light with a blue or green color and be provided to emitthe light with a charging level as much as notch marks on a scaleaccording to the signal of the charging level transmitted from thebattery pack 20. Also, the LED driver 195 may be driven to turn on theLED 192 with a green or red color under the control of the centralcontroller 11, and the LCD panel driver 196 may be driven to turn on theLCD panel 193 with a blue or green color under the control of thecentral controller 11. In addition, the icon LCD driver 197 may beprovided to turn on the icon LCD 194 with a blue or green color underthe control of the central controller 11 and emit the light with acharging level as much as notch marks on a scale according to thecontrol signal depending on the charging level of the battery pack 20.

According to another aspect of the present invention, there is provideda method for controlling a wireless charger system for battery packsolution including a wireless charger apparatus 10 for receiving a powersource from the outside to transmit a power signal via a charging powertransmitter block 15 in a wireless mode; and a battery pack 20 forreceiving a power signal from the wireless charger apparatus 10 in awireless mode to charge power in a battery cell and supplying a powersource to a portable terminal block 30, the method including: waitingfor charging of an externally supplied power source by checking a stateof the wireless charger apparatus 10 prior to performing a wirelesscharging through the charging power transmitter block 15 of the wirelesscharger apparatus 10 (S01); transmitting a call signal for native ID ofthe battery pack 20 to sense the battery pack 20 through the chargingpower transmitter block 15 of the wireless charger apparatus 10 (S02);transmitting information on a native ID value and a state of the batterypack via the secondary core block 21 of the battery pack 20 by receivinga call signal of the native ID transmitted from the wireless chargerapparatus 10 in the battery pack 20, the native ID value being store ina native ID transmission block 241 of the battery pack 20 (S03);determining the native ID value of the battery pack transmitted from thebattery pack 20 and the state of the battery pack 20 (S04); charging apower in the battery pack 20 by transmitting a power via the chargingpower transmitter block 15 of the wireless charger apparatus 10 andreceiving and charging the power in the battery pack 20 when the batterypack 20 is ready to be charged (S05); sensing a completely chargedsignal in the wireless charger apparatus 10 when the completely chargedsignal is transmitted from the battery pack 20 in the step of chargingthe battery pack (S06); and waiting for reception of the information onthe charging level and the battery pack state from the battery pack 20by suspending a charging operation in the central controller 11 of thewireless charger apparatus 10 when the information on the completelycharged signal is received from the battery pack 20 (S07).

In this case, the step of waiting for charging of a power source (S01)include: transmitting a signal for a charging-standby state from thecentral controller 11 to the display block 19 to turn off the LED 192and the LCD panel 193 (S011); the step of transmitting a call signal ofthe native ID (S02) may include: transmitting a control signal to theLED driver 195, the LCD panel driver 196 and the icon LCD driver 197 sothat the LED 192 and the LCD panel 193 can display a call state of thenative ID (S021); the step of charging a battery pack (S05) may include:transmitting a control signal to the LED driver 195, the LCD paneldriver 196 and the icon LCD driver 197 so that the LED 192 and the LCDpanel 193 can display a charging state (S051), the step of receivinginformation on the completely charged signal (S06) may include:transmitting a control signal to the LED driver 195, the LCD paneldriver 196 and the icon LCD driver 197 so that the LED 192 and the LCDpanel 193 can display a completely charged state (S061), and the step ofwaiting for charging of a power source (S01) may further include:transmitting a control signal to the LED driver 195, the LCD paneldriver 196 and the icon LCD driver 197 so that the LED 192 and the LCDpanel 193 can display an error state when a signal for foreignsubstances, which is different from a native ID value of the batterypack, is detected from the charging power transmitter block 15 of thewireless charger apparatus 10.

Advantageous Effects

As described above, the wireless charger system for a battery packsolution, which is composed of a wireless charger apparatus and abattery pack, according to the present invention may be useful to supplya power source to a portable terminal block through the wireless powertransmission, wherein input powers such as a power for computers andnotebook computers using a USB port, an external power used as a poweroutlet, a mobile power used as a cigar connection port in vehicles areeasily supplied to a portable terminal block.

In particular, the wireless charger system according to the presentinvention may be useful to easily operate the wireless power chargingsystem and easily check an operation state of the wireless powercharging system that is displayed on a display block since the displayblock is formed in the front portion of the wireless charger apparatus.

DESCRIPTION OF DRAWINGS

FIG. 1 is an exploded perspective view showing a wireless charger systemaccording to the present invention.

FIG. 2 is a schematic configuration block view showing a wirelesscharger system according to the present invention.

FIGS. 3 to 7 are schematic illustrative views showing a display state ona display block of the wireless charger system according to the presentinvention.

FIG. 8 is a configuration block view showing the display block of thewireless charger system according to the present invention.

FIGS. 9 and 10 are flowcharts showing a method for controlling awireless charger system according to the present invention.

FIGS. 11 and 12 are circuit configuration views showing a battery packof the wireless charger system according to the present invention.

FIGS. 13 to 18 are graphs illustrating charging efficiencies accordingto the extent where a battery pack goes away from the wireless chargersystem according to the present invention.

FIGS. 19 and 20 are an exploded perspective view and a sidecross-sectional view showing a configuration of the battery packaccording to the present invention.

FIG. 21 is a graph showing charging efficiencies obtained throughrepeated charging/discharging experiments on the battery pack accordingto the present invention.

BEST MODE

Hereinafter, exemplary embodiments of the present invention will bedescribed in more detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing a wireless charger systemaccording to the present invention, FIG. 2 is a schematic configurationblock view showing a wireless charger system according to the presentinvention, and FIGS. 3 to 7 are schematic illustrative views showing adisplay state on a display block of the wireless charger systemaccording to the present invention. Also, FIG. 8 is a configurationblock view showing the display block of the wireless charger systemaccording to the present invention, FIGS. 9 and 10 are flowchartsshowing a method for controlling a wireless charger system according tothe present invention, respectively. In addition, FIGS. 11 and 12 arecircuit configuration views showing a battery pack of the wirelesscharger system according to the present invention.

Also, FIGS. 13 to 18 are graphs illustrating charging efficienciesaccording to the extent where a battery pack goes away from the wirelesscharger system according to the present invention, FIGS. 19 and 20 arean exploded perspective view and a side cross-sectional view showing aconfiguration of the battery pack according to the present invention,respectively, and FIG. 21 is a graph showing charging efficienciesobtained through repeated charging/discharging experiments on thebattery pack according to the present invention.

That is to say, the wireless charger system (A) for a battery packsolution according to the present invention includes a wireless chargerapparatus 10 for receiving a power source from the outside andtransmitting a power signal via a charging power transmitter block 15 ina wireless mode; and a battery pack 20 for receiving a power signal fromthe wireless charger apparatus 10 in a wireless mode to charge a batterycell with a power and supplying a power source to a portable terminalblock 30, as shown in FIGS. 1 to 21.

For the wireless charger system (A), the expression ‘battery packsolution’ means that the wireless charger system (A) is used to supply apower source to the portable terminal block 30, wherein a wirelesscharger apparatus 10 and a portable terminal block are configured on thebasis of the battery pack according to the present invention, and apower source is supplied through their systematic relation to stablysupply and charge a power source.

The above-mentioned wireless charger system (A) for a battery packsolution is provided with a wireless charger apparatus 10 for supplyinga power to the battery pack 20 as shown in FIGS. 1 and 2, wherein thewireless charger apparatus 10 is provided with a power receiver blockfor receiving a power source from the outside, and converts a power ofthe power receiver block 12 and transmits the converted power from thecharging power transmitter block 15 in a wireless mode.

In particular, the wireless charger apparatus 10 has an outer bodycomposed of a resonant converter for supplying power to the battery pack20 and a wireless charger case 101 having a central controller installedinside.

And, the wireless charger case 101 has a protruded round portion 102formed around the rear thereof, a front portion 103 formed around thefront thereof, and a battery pack positioning block 104 formed betweenthe protruded round portion 102 and the front portion 103. Therefore,the protruded round portion 102 is formed to surround the rear edge ofthe wireless charger case 101, and a display block 19 is provided in thefront portion 103 that is a slop surface formed in the front thereof.

Also, the battery pack positioning block 104 has a flat surface formedbetween the protruded round portion 102 and the front portion 103, andis formed with a lower height than the protruded round portion 102 andthe front portion 103. Therefore, it is possible to prevent the batterypack 20 disposed on the battery pack positioning block 104 from beingdetached out when the battery pack 20 is on charge. In addition, afixing belt, which is attachable/detachable with a velcro tape, mayfurther provided to prevent the battery pack 20 from being shaken oncharge.

As a result, the fixing belt is provided so that a power can be suppliedto the battery pack 20 that is disposed on the battery pack positioningblock 104 having a primary core block 151 installed inside, the primarycore block 151 functioning to transmit a power supplied to the batterypack 20.

Also, according to the concrete configuration of the power receiverblock 12 in the wireless charger apparatus 10, the power receiver block12 may include a USB receiver port 121a for receiving a power and acontrol signal from USB ports of notebook computers or computers; apower outlet 121b for receiving a conventional power source from theoutside; and a cigar connection port 121c coupled to a cigar jack of anautomobile to receive a power in motions. Also, the power receiver block12 is provided with an input power processor block 122 for converting asuitable power to the wireless charger apparatus 10 according to thecurrent types that is coupled to the USB receiver port 121a, the poweroutlet 121b and the cigar connection port 121c to supply a powerthereto. And, the power receiver block 12 is provided with a powercontrol block 123 for control a power transmitted from the USB receiverport 121a, the power outlet 121b, and the cigar connection port 121c tocontrol an input power, and also control a power supplied to componentsof the central controller 11, the charging power transmitter block 15and the wireless charger apparatus 10.

In addition, the wireless charger system (A) is provided with a resonantconverter 14 for converting an output signal including a power signaland a data signal, both of which are supplied from the power receiverblock 12, and supplies a power signal and a data signal from theresonant converter 14 to the charging power transmitter block 15provided with a primary core block 151.

Also, one side of the gate driver 13 provided with a bootstrap gatedrive is coupled to the power receiver block 12 to transmit the outputsignal including a data signal and a power signal to the resonantconverter 14 formed in the other side of the gate driver 13, andcontrolled by the central controller 11.

In addition, the wireless charger system (A) is provided with a currentdetector block 16 coupled between the power receiver block 12 and theresonant converter 14 to detect a data signal of the battery pack 20through the transmission operation by the primary core block 151. And,the wireless charger apparatus 10 is controlled by the centralcontroller 11 for controlling the power receiver block 12, the resonantconverter 14, the gate driver 13 and the current detector block 16.

Additionally, the wireless charger system (A) includes a display block19 for displaying a state of the wireless charger apparatus 10 accordingto the control signal of the central controller 11.

Also, the battery pack 20 of the wireless charger system (A) for abattery pack solution is configured, as follows. That is to say, thebattery pack 20 includes a secondary rectification circuit block 22 forconverting an induced electromotive force so as to receives a power fromthe wireless charger apparatus 10 in a wireless mode, the inducedelectromotive force being generated in the secondary core block 21 bymeans of the induced magnetic field that is generated by the primarycore block 151 of the wireless charger apparatus 10, as shown in FIG. 1.

Also, the battery pack 20 according to the present invention includes abattery pack controller 24, a battery pack charging circuit block 25, adata input/output block 26, a charge monitoring circuit block 27, andthe like. In this case, the battery pack controller 24 functions tocontrol the entire operation of the battery pack 20. Here, the batterypack controller 24 is coupled to the secondary rectification circuitblock 22 to supply a charging power to the battery cell 23 and processdata that is transmitted/received by the primary core block 151 and thesecondary core block 21. Therefore, the battery pack controller 24functions to transmit a data signal toward the wireless chargerapparatus 10, the data signal including a charging state of the batterypack 20, an error state of the battery pack 20 and a signal value of thenative ID.

Additionally, the battery pack charging circuit block 25 is controlledunder the control of the battery pack controller 24 and provided tosupply a power, supplied from the secondary rectification circuit block22, to the battery cell 23 and supply a power of the battery cell 23 tothe portable terminal block 30. Also, the battery pack 20 is alsoprovided with a charge detector block 251 for detecting a charging levelof the battery cell 23.

Also, the data input/output block 26 function to transmit/receive datato/from a data terminal processor block 31 of a portable terminal block30 under the control of the battery pack controller 24 relative to thedata transmitted/received to/from the wireless charger apparatus 10, andprocess the data.

Furthermore, the charge monitoring circuit block 27 functions to check acharging level of the battery cell 23 and transmit a fully-charged ordischarged signal to the battery pack controller 24.

The battery pack 20 used in the wireless charger system (A) asconfigured thus may have a shape of an all-in-one hard pack, a built-inshape and a semi-inner pack according to the attachment and detachmentto/from the portable terminal block 30. Here, the all-in-one hard packmay control a charging level in the battery pack without any limitationon the portable terminal block and generate a native ID to transmit thepresence of foreign substances to the wireless charger apparatus. Inthis case the all-in-one hard pack is referred to as a battery packhaving a configuration where a power may be supplied to the portableterminal block power. Also, the built-in shape means that theabove-mentioned battery pack is provided inside the portable terminalblock, and the semi-inner pack means that the above-mentioned batterypack is detached from the portable terminal block, or coupled to theportable terminal block, thereby facilitating the charging and supply ofthe power.

That is to say, the battery pack 20 configured as shown in FIG. 11 maybe used with its being attached/detached to/from the portable terminalblock 30, and its charging may be carried out by disposing the batterypack 20, in the form of the all-in-one hard pack, on the battery packpositioning block 104 of the wireless charger apparatus 10. Maincomponents of the battery pack 20 include a secondary core block 21driven in a coil or core manner, a secondary rectification circuit block22 for rectifying an induced electromotive force of the secondary coreblock 21; a battery cell 23; a battery pack charging circuit block 25; acharge monitoring circuit block 27 for monitoring and protecting acharging level of the battery pack during the charging operation of thebattery pack (including a protection circuit module (PCM) circuit forpreventing overcharging of the battery pack); and a terminal block 28coupled to the charge monitoring circuit block 27 to supply a powersource to the portable terminal block 30. Of course, the battery packcontroller 24 monitors and controls the communication with the wirelesscharger apparatus 10, the supply of a power source to the portableterminal block 30, the charging level of the battery cell 23, theoperation of the battery pack 20, etc. Therefore, the battery packcontroller 24 may be configured so that LDO (Low Drop Out), ID (TX andRX communication), FET drives, battery charging state-input (empty orfull signal) functions, oscillators, and port for enabling/disabling thecharging circuit can be installed inside the battery pack controller 24.

Also, the main components of the battery pack may be provided so thatthey can be configured in a built-in shape by forming the battery packintegrally with the portable terminal block. That is to say, thesecondary core block and the magnetic field shielding plate are formedintegrally in a case cover disposed in the rear of the portable terminalblock (a core may be injection-molded so that it can be formedintegrally with a cover, or a protection case may be manufactured andprovided in the core using an ultrasonic welding process), a secondaryrectification circuit block and a wireless native ID recognition circuitare additionally formed as an inner circuit of the portable terminalblock, and a DC/DC converter and a charging circuit installed inside theportable terminal block may be used by itself. For this purpose, thebattery pack may be provided in a built-in shape.

In particular, the battery pack 20 may be provided in the form of asemi-inner pack in the present invention as shown in FIG. 12. That is tosay, the battery pack 20 may include a secondary core block 21 driven ina coil or core manner; a secondary rectification circuit block 22coupled to the secondary core block 21; a battery cell 23 (positivetemperature coefficient (PTC) circuit installed inside); and a terminalblock 28 coupled to the portable terminal block. Also, the battery packcontroller 24 may be configured so that LDO (Low Drop Out), ID (TX andRX communication), FET drives, battery charging state-input (empty orfull signal) functions, oscillators, and port for enabling/disabling thecharging circuit can be installed inside the battery pack controller 24.Therefore, the portable terminal block 30 coupled to the terminal block28 may be provided with a GSM charging control block that may control acharging level of the battery cell 23 while receiving a power sourcefrom the battery cell 23 or the battery pack controller 24 of thebattery pack 20. This GSM charging control block may include a GSMDC/DCconverter 33 (DC/DC converter block); and a GSM charging control block34 coupled to the charge monitoring circuit block 27 that is coupled toa GSMDC/DC converter 33 to monitor a charging level of the battery cell23. For the battery pack 20 in this form of a semi-inner pack, since theportable terminal block 30 is provided with circuits including theGSMDC/DC converter and the GSM charging control block, the portableterminal block coupled to the battery pack 20, in the form of anattachable/detachable semi-inner pack, through the terminal block isreferred to as a ‘GSM portable terminal block.’

Therefore, when the GSM portable terminal block having the battery pack20 installed inside in the form of a wireless charging semi-inner packis put on the battery pack positioning block 104 of the wireless chargerapparatus 10, an induced magnetic field is formed in the wirelesscharger apparatus 10 to transmit a power to the battery pack in thesecondary core block. Therefore, the battery pack 20 receives an ACinduced electromotive force from the secondary core block 21, rectifiesthe AC induced electromotive force into a DC induced electromotive forcein the secondary rectification circuit block 22, and transmits the DCinduced electromotive force to the battery pack controller 24.

Therefore, a power may be regularly and stably received and charged inthe battery pack controller by transmitting a signal for adjusting apower transmitted from the wireless charger to a constant voltage level.For example, assume that a voltage of a received power is set to areference voltage of 5V. In this case, when the voltage of the receivedpower exceeds 5.5V, a power save code signal is generated to reduce apower in the wireless charger 10, and therefore a parameter (frequency)of an induced magnetic field generated in the primary core block 151 isadjusted in the wireless charger apparatus 10 so that the powertransmitted from the battery pack can be reset to a voltage of about 5V.Then, when the continuously received power is under the optimum voltageconditions such as 5V in the battery pack controller 24, information onthe optimum voltage conditions is transmitted to the wireless chargerapparatus 10, and a charging operation is then carried out in thewireless charger apparatus 10 until the completely charged signal isreceived from the wireless charger apparatus 10.

For this charging operation, when the information received from thewireless charger apparatus 10 is not a predetermined information on thenative ID of the battery pack 20, an error is caused by recognizing asif foreign substances are put on the wireless charger apparatus 10.

The wireless charger system (A) according to the present invention, asconfigured thus, includes a wireless charger apparatus 10 and a batterypack 20, which are provided to operate the wireless charger system (A).Therefore, the display block 19 displays a state controlled according tothe operation of the wireless charger apparatus 10, which allows a userto see the state.

That is to say, the wireless charger system is provided with a displaysignal receiver block 191 for receiving a control signal transmittedfrom the central controller 11 of the wireless charger apparatus 10.Here, the display signal receiver block 191 is coupled to the displaysignal receiver block 191 to turn on or off the LED 192, the LCD panel193 and the icon LCD 194 according to the control signal transmittedfrom the central controller 11.

For this purpose, the display signal receiver block 191 includes an LEDdriver 195 coupled to the display signal receiver block 191 to turn onthe LED 192 according to the control signal transmitted from the centralcontroller 11; an LCD panel driver 196 coupled to the display signalreceiver block 191 to turn on the LCD panel 193 according to the controlsignal transmitted from the central controller 11; and an icon LCDdriver 197 coupled to the display signal receiver block 191 to turn onthe icon LCD 194 according to the control signal transmitted from thecentral controller 11.

According to the detailed configuration of the display signal receiverblock 191, the LED 192 is provided to emit light with a green or redcolor, the LCD panel 193 is provided to emit light with a blue or greencolor, and the icon LCD 194 is provided to emit light with a charginglevel as much as notch marks on a scale according to the signal of thecharging level transmitted from the battery pack 20.

For this purpose, the LED driver 195 drives the LED 192 to be turned onwith a green or red color under the control of the central controller11, the LCD panel driver 196 drives the LCD panel 193 to be turned onwith a blue or green color under the control of the central controller11, and the icon LCD driver 197 is provided to turn on the icon LCD 194with a blue or green color under the control of the central controller11, and to emit the light as much as notch marks on a scale according tothe control signal due to the charging level of the battery pack 20.

Referring to the operation of the wireless charger system (A) for abattery pack solution according to the present invention as configuredthus, the wireless charger system (A) is provided with a wirelesscharger apparatus 10 for receiving a power source from the outside andtransmitting a power signal via the charging power transmitter block 15in a wireless mode, and also provided with a battery pack 20 forreceiving a power signal from the wireless charger apparatus 10 in awireless mode to charge the battery cell with a power and supplying apower source to the portable terminal block 30, and therefore thewireless charger system is controlled in the following steps.

That is to say, a state of the wireless charger apparatus 10 is checkedand the charging operation is in a standby mode prior to chargingexternally supplies power sources in a wireless mode through thecharging power transmitter block 15 of the wireless charger apparatus 10(S01). Then, a call signal for a native ID of the battery pack 20 istransmitted to sense the battery pack 20 through the charging powertransmitter block 15 of the wireless charger apparatus 10 (S02).

Subsequently, the signal for the native ID transmitted from the wirelesscharger apparatus 10 is received in the battery pack 20 to transmitinformation on a native ID value and the state of the battery pack viathe secondary core block 21 of the battery pack 20 (S03), the native IDvalue being stored in the native ID transmission block 241 of thebattery pack 20.

As described above, a state of the battery pack 20 is determined bydetermining the native ID value of the battery pack transmitted from thebattery pack 20 (S04).

Then, when the battery pack 20 is detected and ready to be charged, apower is transmitted via the charging power transmitter block 15 of thewireless charger apparatus 10, and therefore the battery pack 20 ischarged by receiving a power (S05).

Also, the battery pack 20 is charged in the step of charging the batterypack. When the charging of the battery cell is completed, a signal, suchas a state displaying the charging is completed in the battery pack, istransmitted to the wireless charger apparatus 10, and the signal issensed in the wireless charger apparatus 10 (S06).

Also, when the information on the completely charged signal is receivedfrom the battery pack 20, the charging operation is suspended under thecontrol of the central controller 11 of the wireless charger apparatus10, and waiting to receive information on the charging level from thebattery pack 20 and the state of the battery pack (S07).

In the step of waiting for information on the battery pack, it ischecked that battery pack 20 is continuously sensed. When the batterypack is not sensed, a call signal is continuously transmitted to checkthat there is a newly sensed battery pack. Then, when a new battery packis sensed, a native ID value of the battery pack is called, and then anormal operation and a charging level of the battery pack are determinedwhen the native ID value is proven to be a suitable battery pack ID.Then, when the charging of the battery pack is completed, the batterypack is continuously in a standby mode. On the contrary, when thecharging of the battery pack is proven to be required, a chargingoperation of the wireless charger apparatus 10 is carried out.

For the wireless charger system (A) for a battery pack solutionaccording to the present invention as configured thus, an operation ofthe display block 19 of the front portion 103 according to theoperations of the wireless charger apparatus 10 and the battery pack 20will be described in detail, as follows.

That is to say, the step of waiting for the charging of a battery pack(S01) including a step of displaying a charging-standby state (S011). Inthis step (S011), a signal for the charging-standby state is transmittedfrom the central controller 11 to the display block 19 to turn off theLED 192 and the LCD panel 193, as shown in FIG. 3. Therefore, the LED192, the LCD panel 193 and the icon LCD 194 are displayed as a turn-offstate.

Also, the step of transmitting a call signal for a native ID (S02)includes a step of displaying a native ID call state (S021). In thisstep (S021), the LED 192 and the LCD panel 193 transmit a control signalto the LED driver 195, the LCD panel driver 196 and the icon LCD driver197 to display a native ID call state, as shown in FIG. 4. Therefore,the LED 192 is turned on with a green (LED green) color, and the LCDpanel 193 is turned on with a blue (LCD blue) color.

In addition, the step of charging a battery pack (S05) includes a stepof displaying a charging state. In this case, the LED 192 and the LCDpanel 193 transmit a control signal to the LED driver 195, the LCD paneldriver 196 and the icon LCD driver 197 to display a charging state, asshown in FIG. 5. Therefore, the LED is turned off, and the LCD panel 193is displayed with a blue color. And, the icon LCD 194 is displayed witha blue color, but notch marks are increased one by one according to thecharging state from a period that the notch marks are not displayedaccording to the charging of the battery cell as the power is consumed.Therefore, the notch marks in the charging level are displayed from 0through one, two to three, and therefore it is possible to check thecharging state according to the notch marks.

In the similar manner, the step of receiving information on a completelycharged signal (S06) includes a step of displaying a completely chargedstate (S061). In this case, the LED 192 and the LCD panel 193 transmit acontrol signal to the LED driver 195, the LCD panel driver 196 and theicon LCD driver 197 so that the battery pack 20 can be displayed in acompletely charged state, as shown in FIG. 6. Therefore, the LED 192 isturned off/on with a green color (LED green blinking), and the LCD panel193 is turned off/on with a green color (LCD green blinking). Also, theicon LCD 194 is turned off/on with a green color together with the LCDpanel 193, and all of the notch marks are turned off/on at the sametime.

Also, the step of waiting for the charging of a battery pack (S01)further includes a step of displaying an error signal (S012). In thiscase, the LED 192 and the LCD panel 193 transmits a control signal tothe LED driver 195, the LCD panel driver 196 and the icon LCD driver 197to display an error state when a signal for foreign substances, which isdifferent from the native ID value of the battery pack, is sensed fromthe charging power transmitter block 15 of the wireless chargerapparatus 10, as shown in FIG. 7. Therefore, the LED 192 is turned onwith a red color (LED red), and the LCD panel 193 is turned off (LCDoff). Therefore, it is possible to allow a user to easily observe theoperation of the display block 19 with the naked eye in the front of thedisplay block 19, the display block 19 being formed in the front portion103 of the wireless charger apparatus 10, and also to check theoperation of the wireless charger system (A).

TABLE 1 Display blocks Status LED LCD panel icon LCD Particulars StandbyOFF OFF OFF Normal, substances mode detected in standby mode ID callmode GREEN BLUE BLUE ID detected when a battery pack is put on a chargerCharging OFF BLUE BLUE Display that a mode (notch battery pack is marks)on charge Completely GREEN GREEN GREEN Display that a charged batterypack is mode fully charged Display RED OFF OFF Erroneous Temp., mode ofID error, alarming error signals the detection of foreign substances

In FIGS. 3 to 7, it is shown that a turn-off state is represented by ablank figure in Table 1, GREEN is represented by slashes ofvertical/horizontal line segments, BLUE is represented by a filled blackcolor, and RED is represented by filled dots.

The configuration and operation of the wireless charger system (A) for abattery pack solution according to the present invention, as configuredthus, will be described in detail, as follows.

That is to say, for the wireless charger system (A) for a battery packsolution according to the present invention, an input power source ofthe wireless charger apparatus 10 may includes a conventional externalinput power source, a cigar power source that may be received in motionof vehicles, and a power source for a USB port input that may bereceived from computers and notebook computers. The wireless chargerapparatus 10 receiving the input power source includes a battery packfor supplying a power source to a portable terminal block; and anapparatus for transmitting a power in a wireless mode using an inducedelectromotive force. Here, the portable terminal block may includemobile phones, PDA, MP3 players, DAB, DMB terminals, PMP, Handheldterminals, etc.

In particular, when foreign substances such as metals other than thebattery pack (a pack having secondary wireless charger module installedinside) of the portable terminal block to be charged are put on thecharging power transmitter block that is a charger block of the wirelesscharger apparatus 10, the charging power transmitter block has afunction to sense the foreign substances and suspend the wirelesscharging operation, and also has a function to recognize the batterypack of the portable terminal block to check a charging state. Also, thecharging power transmitter block functions to prevent an overload when awireless charging apparatus is taken into action, and also has atemperature protection function.

Also, the battery pack 20 includes a rectification circuit block, anative ID transmission block 241, a charging circuit block, a protectioncircuit block, a battery cell, etc. Here, the battery pack 20 may beinstalled inside the portable terminal block, and also be charged whenit is detached from the portable terminal block.

That is to say, an induced magnetic field is generated in a chargingmodule of a primary core block by using a DC input source power sourceinto which a power source for USB ports of computers, and a power sourceinputted from an AC adapter, a cigar Jack and the like are converted.Therefore, a voltage is always adjusted to a constant voltage level in arectifier end of the secondary core block that is the battery pack.

Therefore, a power is controlled in the primary wireless chargerapparatus 10 by using a frequency automatic variable algorithm, but aninduced magnetic field is formed with an LC resonance by performing aswitching operation every certain time. This mode is referred to as astandby mode. The primary wireless charger apparatus 10 waits for aresponse from the secondary battery pack by means of the inducedmagnetic field. In this case, the primary wireless charger apparatus 10waits for an acknowledge response signal from the secondary battery packby transmitting a request (FSK signal) signal in a standby mode.Therefore, when a response signal from the secondary battery pack is notreceived, a standby mode in which a request (FSK) signal is transmittedis continuously carried out. Then, when a response signal from thebattery pack is detected by the signal detector block 163 coupled to theprimary core block 151, the signal detector block 163 analyzes theresponse signal to determine whether a charging operation is carriedout.

The induced magnetic field, which is transmitted by the standby mode asdescribed above, may be transmitted via the charging power transmitterblock 15 formed on the wireless charger apparatus 10. In this case, thebattery pack is not properly disposed in the charging power transmitterblock 15, and a response to the load modulation is not generated as asignal such as a normal signal from the battery pack when foreignsubstances such as metals are put on the charging power transmitterblock 15. The wireless charger apparatus 10 is provided with atemperature detector block 162 so as to prevent the wireless chargerapparatus 10, particularly a primary core block, from being overheatedby the metal foreign substances as the reaction of the abnormal responsegenerated when the foreign substances are put on the charging powertransmitter block 15. And, the temperature detected by the temperaturedetector block 162 is transmitted to the central controller to adjustthe intensity of the induced magnetic field according to the overheatingof the primary core block.

Also, when overcurrent and overvoltage are detected by the currentdetector block 16 for detecting a current flow of the wireless chargerapparatus 10, the current flow may be intercepted or adjusted by thecentral controller 11. When an abnormal state is detected by thetemperature detector block 162 and the current detector block 16 in thewireless charger apparatus 10 as described above, the abnormal state isconverted into the step of displaying an error signal in the centralcontroller 11, and then displayed on the display block 19. In addition,when dusts or bed smells are caused, a dust sensor circuit 165 sensesthe dusts or bed smells, and therefore it is possible to remove thedusts or bed smells by generating ions in the ionizer transmission block164.

Also, an induced magnetic field is formed in the primary core block 151of the wireless charger apparatus 10, and then sensed in the secondarycore block 21 of the battery pack 20, as shown in FIG. 2. Accordingly,an AC power derived from a coil is rectified into a DC power in thesecondary rectification circuit block 22 during a period that an ACpower is turned on, and a power source is supplied to the battery packcontroller 24 (adapter control block). Therefore, when the battery packcontroller 24 receives a primary frequency shift keying (FSK) code froma RXD signal line, and the primary FSK code is matched with a codesignal of the native ID transmission block 241, the primary FSK code isrecognized as an acknowledge to generate a native ID data value of thenative ID transmission block 241. Then, the native ID data value istransmitted to a primary side through the load modulation, and thenative ID data value of the battery pack transmitted via the primarycore block 151 is detected to be a normal signal in the signal detectorblock 163 of the wireless charger apparatus 10. And, a signal istransmitted to the central controller 11 to determine whether the nativeID data value is a normal native ID data value. In this case, when thenative ID data value is a normal native ID data value, the powerreceiver block 12, the gate driver 13, the resonant converter 14 and thelike are controlled so that they can be switched in a full-power modefor the entire period to generate an AC power. Therefore, a wirelessinduced magnetic field is generated in the charging power transmitterblock 15. Of course, the induced magnetic field is transmitted togetherwith a frequency when the induced magnetic field is transmitted from thecharging power transmitter block 15 in this manner, and therefore aninduced magnetic field is generated when a signal istransmitted/received between the wireless charger apparatus 10 and thebattery pack 20. Also, the central controller 11 performs the step ofcharging a battery pack by displaying a charging state on the displayblock 19.

Also, when the native ID data value is not proven to be a normal nativeID data value, the native ID data is recognized as a foreign substanceto transmit an error signal (a step of displaying an error signal). Ofcourse, the battery pack is controlled not to transmit a power. And, thebattery pack is maintained to a standby mode in which the normal nativeID data value of the battery pack is requested (a step of waiting forcharging of a battery pack).

In addition, a power signal transmitted by the primary core block 151 ofthe wireless charger apparatus is transmitted via the secondary coreblock 21 of the battery pack, and this power signal is used as Vsense tosense the intensity of an input voltage. Therefore, when the signaldetector block 163 detects, for example, a voltage of the received powerto be a stable voltage of about 5V, the signal detector block 163maintains the voltage of the received power to a constant voltage level.And, when a voltage of the received power is received as a low voltagevalue or a too high voltage value, information on the voltage adjustmentis used as load modulation. In this case, the information is transmittedto the wireless charger apparatus 10 to maintain a constant voltagelevel. As a result, when the information on the voltage adjustment isadjusted to a constant voltage level, an operation of a charging IC inthe battery pack charging circuit block 25 is in an active state tocharge the battery cell 23 with a power. When the battery cell 23 of thebattery pack 20 is charged with a power transmitted from the wirelesscharger apparatus 10 as described above, the battery cell 23 is stablycharged by determining the stability of the battery cell 23 in thecharge monitoring circuit block 27 in charging the battery cell 23.

Also, the charge detector block 251 senses a charging level of thebattery cell 23. Therefore, when the battery cell 23 is completelycharged, the charge detector block 251 senses the completely chargedstate to recognize the completely charged state as an active high signaland transmits the active high signal to the battery pack controller 24.Here, the active high signal is transmitted to the primary core block151, and then transmitted to the wireless charger apparatus 10 togetherwith the native ID code value. Then, the central controller 11 of thewireless charger apparatus 10 is converted into a standby mode bysuspending the charging operation, and displays the completely chargedstate on the display block 19 (a step of receiving information on acompletely charged signal).

During the charging operation of the wireless charger system (A) for abattery pack solution that is composed of the wireless charger apparatus10 and the battery pack 20, when the power transmitted from the batterypack 20 has a lower voltage value than the reference voltage as aposition of the battery pack 20 disposed on the charging powertransmitter block 15 of the wireless charger apparatus 10 is changed toanother position, a signal is transmitted to the wireless chargerapparatus 10 to supplement this voltage value. For example, where it isassumed that the reference voltage is set to 5V and the referencedeviation value is set to 0.5V, the battery pack controller 24 controlsa transmission signal to be boosted by about 0.5V when a voltage of lessthan 4.5V is received due to the movement of the battery pack 20. Then,the wireless charger apparatus 10 enhances a transmission power of theprimary core block to boost a voltage by 0.5V and transmits the boostedinduced magnetic field. Therefore, an oscillation frequency is changed,for example, in a manner for enhancing a transmission power that isoutputted from the wireless charger apparatus 10.

When the transmission power transmitted from the wireless chargerapparatus 10 is enhanced as described above, charging efficiencies tothe changes in distance of the battery pack 20 from the battery packpositioning block that is a cradle of the wireless charger apparatus 10are shown in FIGS. 13 to 18. That is to say, FIGS. 13 to 16 show theresults of a primary power (W) in the wireless charger apparatus andsecondary power (W) and efficiency (%) in the battery pack when asecondary reference power of the battery pack is set to about 2.5 W anda position of the battery pack moves by −7 mm ˜7 mm in a horizontaldirection and a vertical direction, respectively. Here, the efficiency(%) is represented by an efficiency of an output power to a primaryinput power of the wireless charger apparatus ((secondary power/primarypower)*100), the output power being applied to a secondary side of thebattery pack.

Also, the compensation of the transmission power is adjusted to 0.5 Waccording to the present invention, and therefore FIGS. 13 and 15 showgraphs that is plotted in a secondary power of 2˜2.5 W in the case ofthe battery pack, which indicates the charging efficiency when thebattery pack is charged without the changed in frequency in the wirelesscharger apparatus 10 relative to the changes in horizontal distances andvertical distances of the wireless charger apparatus 10 and the batterypack 20. That is to say, when the battery pack 20 moves in a horizontaldistance or a vertical distance relative to the wireless chargerapparatus 10, a secondary power of the battery pack 20 drops as thesecondary power goes away from the center, which leads to the decreasingefficiency.

Therefore, from FIGS. 14 and 16, it is revealed that the wirelesscharger apparatus 10 receives information on the change in the powerreceived from the battery pack, and thus controls a power by changing afrequency as the battery pack 20 moves from the battery pack positioningblock, which is a cradle disposed on the wireless battery pack 10, in ahorizontal distance and a vertical distance respectively, compared toFIGS. 13 and 15. In this case, it is seen that the power is transmittedstably, and therefore the transmission efficiency of the power is good.

Also, FIG. 17 shows a graph plotting an efficiency to the movement ofthe battery pack 20 in a horizontal direction, and FIG. 18 shows a graphplotting an efficiency to the movement of the battery pack 20 in avertical direction. Here, it is revealed that the efficiency is betterwhen there is a change in frequency (an upper rectangular dots graph,POWER CONTROL) than when there is no change in frequency (a lower curvegraph, FIXED POWER).

According to the wireless charger system (A) for a battery pack solutionthat is composed of the wireless charger apparatus 10 and the batterypack 20, a power source is supplied to the portable terminal block 30,wherein an input power such as a power for computers and notebookcomputers using a USB port, an external power used as a power outlet, amobile power used as a cigar connection port in vehicles is easilysupplied to a portable terminal block.

In particular, a charging state may be easily checked through thedisplay state on the display block 19 of the wireless charger apparatus10 according to the operation of the wireless power charging system (A).

In addition, the wireless charger system according to the presentinvention is provided with a shielding member to protect the batterypack from the magnetic field generated by the primary core block 151 ofthe wireless charger apparatus 10 and the secondary core block 210 ofthe battery pack 20, as shown in FIGS. 19 to 21.

First of all, FIG. 19 is an exploded perspective view showing aconfiguration of a wireless battery pack 20 having a wireless powerreceiver module. Here, a battery pack composed of coil, fine metal, thinaluminum film (foil, etc.), lithium ion or lithium polymer has no effecton cells since a thin aluminum film is introduced into the battery packto completely cut off the magnetic field, which allow the cells to becharged/discharged at cell cycles of 500 or more. Here, the shapes ofthe core include all kinds of cores. That is to say, the shapes of thecore may include a rectangular shape, a round shape or an oval shape,and various cores such as a winding coil, a spiral core and the like maybe provided herein. In this case, the wireless battery pack 20 having awireless power receiver module includes a wireless power receivercircuit including a battery pack controller 24 and a charging circuitblock 25, both of which are formed in one side of the charging batterycell 213, and the wireless power receiver circuit 223 may include ashielding member 219 for preventing a surrounding magnetic field.

Also, the wireless battery pack 20 is provided with shielding plates214, 215, 216, 217 and 218 provided in the bottom, the front, the rear,the left side and the right side of the charging battery cell 213 toprotect the charging battery cell 213 from the magnetic field of theprimary core block and the secondary core block 210 by shielding themagnetic field.

Then, since the five regions, for example, the front, the rear, the leftside, the right side and the bottom of the charging battery cell 213 areprovided respectively with the shielding plates 214, 215, 216, 217 and218 to cut off the magnetic field generated by the primary core blockand the secondary core block 210, it is possible to prevent damage ofthe charging battery cell 213 from the magnetic field. Therefore, anadditional shielding plate may be provided in an upper surface of thecharging battery cell 213, when necessary. In this case, it is desirablewhen temperature is not increased due to the completely closedsurroundings of the charging battery cell 213.

As described above, the shielding plates 214, 215, 216, 217 and 218 andthe shielding member 219 may be formed of thin discs including Al, Cu,Ni Alloy metals.

Also, a magnetic plate 29 is formed between the shielding plates 214 andthe charge receiver module 212 to facilitate the induction of themagnetic field induced from the secondary sore 210, the shielding plates214 formed in the bottom of the charging battery cell 213. This magneticplate 29 includes amorphous ferrites, Mn—Zn (50 parts by weight:50 partsby weight), Ni—Fe (80 parts by weight:20 parts by weight), fine metals(Fe—Si—Cu—Nb), etc.

The magnetic plate 29 may be composed of an upper magnetic plate 291formed between the shielding plates 214 and the charge receiver module212; and a lower magnetic plate 252 disposed in a lower portion of thecharge receiver module 212. Therefore, the lower magnetic plate 292 hasa lower plate thorough hole as a thorough hole passed through the centerthereof. This shape of the lower plate thorough hole 293 is preferablyformed with the same shape as the core of the secondary core block 210.For example, FIG. 19 shows that the lower plate thorough hole 293 of thelower magnetic plate 292 is formed with a round shape since thesecondary core block 210 is formed of a round core. However, when thecore is formed with a rectangular shape or a polygonal shape, the lowerplate thorough hole 293 is preferably formed with the same shape.Therefore, an induced electromotive force is easily generated in thesecondary core block 210 due to the presence of the lower plate thoroughhole 293, the secondary core block 210 being that is present within theinduced magnetic field, and the signal may be transmitted/received in aneasy manner.

Also, the magnetic plate 29 is provided with an insulating plate 211that is provided between the shielding plates 214 and the chargingbattery cell 210 to insulate the charging battery cell 210, theshielding plates 214 being formed in the bottom of the charging batterycell 210. Since this insulating plate 211 is formed in the form of amesh or thin film that is made of Ni—Cu, the heat of the shieldingplates 214 is not delivered to the charging battery cell 213.

As another example of the magnetic field shielding member, the magneticplate 29 is provided with a magnetic plate 29 (a primary HPES: HanrimPostech Electro-magnetic shield) formed between an aluminum-basedbattery cell case 213′ and the secondary core block 210 as shown in FIG.20, the aluminum-based battery cell case 213′ constituting an outer bodyof the battery cell 213. In this case, a shield mesh member 294 isfurther provided as a secondary HPES between the magnetic plate 29(i.e., a primary HPES) and the battery cell case 213.′ The magneticplate 19 as a primary HPES and the shield mesh member 294 as a secondaryHPES may be composed of the same components as in the above-mentionedshielding member.

It is known that most of the magnetic field is shielded by the magneticplate 29 that is a primary HPES. As shown in FIG. 20, it is revealedthat a line of magnetic force does not affect a battery cell since theline of magnetic force is bent by the magnetic plate 29 that is ashielding plate. As a result, the heat is generated in a peak region bythe line of magnetic force, and then radiated out by the metallicmagnetic plate 29. In addition, the shield mesh member 294 as asecondary HPES is formed by coating a metal mesh with a coating agentselected from the group consisting of amorphous ferrites, Mn—Zn (50parts by weight:50 parts by weight), Ni—Fe (80 parts by weight:20 partsby weight), or fine metals (Fe—Si—Cu—Nb). Therefore, the secondary HPESfunctions to shield the magnetic field that is not shielded by themagnetic plate 29 that is a primary HPES. An eddy current is formed byexcessive line of magnetic force in the metal mesh of the shield meshmember 294 that is a secondary HPES. In this case, the battery packshould be affected by the magnetic field that is generated by theprimary core block and the secondary core block due to the presence ofthe eddy current formed in the metal mesh. In this experiment, it isrevealed that about 90% of the magnetic field is shielded by themagnetic plate 29 that is a primary HPES, and about 10% of the magneticfield is shielded by the shield mesh member 294 that is a secondaryHPES.

The battery pack 20 including the magnetic plate 29 as a primary HPESand the shield mesh member 294 as a secondary HPES is used to repeat acharging experiment (500 cycles) for the charging efficiency. FIG. 21shows a graph that is plotted using an 80% efficiency curve as thereference curve (hereinafter, referred to as “standard efficiency linesegment” (D)), the 80% efficiency curve being obtained through therepeated charging/discharging of a battery pack at 500 cycles andreferred to as a stable charging efficiency. First, when the batterypack 20 is generally charged through electrical contacts without theexposure to the magnetic field (a graph represented by “N” in FIG. 21),the experiment of the battery pack 20 is carried out so that thecharging capacities can be plotted over the standard efficiency linesegment, which indicates that the charging/discharging efficiency isstable in the battery pack.

Accordingly, for the battery pack 20 according to the present invention,it is shown that the charging/discharging efficiency by the magneticplate 29 as a primary HPES and the shield mesh member 294 as a secondaryHPES (a graph represented by “A” in FIG. 21) is stable with anefficiency of 83.9% on the basis of 500-cycle charging/dischargingexperiment.

However, when the secondary HPES is not used in the battery pack 20, itis shown that the charging/discharging efficiency (a graph representedby “B” in FIG. 21) is rather low with an efficiency of 75.3% on thebasis of 460-cycle charging/discharging experiment. When the primaryHPES and the secondary HPES are not used in the battery pack 20, it isshown that the charging/discharging efficiency (a graph represented by“C” in FIG. 21) is very low with an efficiency of 74.5% in thecharging/discharging experiment at 340 cycles that are far away belowthe 500 cycles. However, it is revealed that the battery pack 20according to the present invention shows a highly excellentcharging/discharging efficiency.

While the present invention has been shown and described in connectionwith the exemplary embodiments, it will be apparent to those skilled inthe art that modifications and variations can be made without departingfrom the spirit and scope of the invention as defined by the appendedclaims.

The invention claimed is:
 1. A wireless charger system for battery packsolution, comprising: a wireless charger apparatus for receiving a powersource from the outside to transmit a power signal via a charging powertransmitter block in a wireless mode; and a battery pack for receiving apower signal from the wireless charger apparatus in a wireless mode tocharge power in a battery cell and supplying a power source to aportable terminal block, wherein the wireless charger apparatus has anouter body composed of a resonant converter for supplying power to thebattery pack and a wireless charger case having a central controllerinstalled inside, wherein the wireless charger case has a protrudedround portion formed around a rear edge and a display block provided asa sloped surface in a front portion thereof, wherein a flat surface isformed between the protruded round portion and the front portion and abattery pack positioning block formed therein, the battery packpositioning block having a lower height than the protruded round portionand the front portion, and wherein a primary core block for transmittingpower supplied to the battery pack is installed inside the battery packpositioning block to supply power to the battery pack disposed on thebattery pack positioning block.
 2. The wireless charger system accordingto claim 1, wherein the wireless charger apparatus comprises: a powerreceiver block for receiving a power source from the outside; a resonantconverter for converting an output signal including a power signal and adata signal supplied from the power receiver block and transmitting theconverted output signal to a charging power transmitter block providedwith a primary core block; a gate driver coupled to the power receiverblock to transmit an output signal including a data signal and a powersignal to the resonant converter, the gate driver being controlled bythe central controller and provided with a bootstrap gate drive; acurrent detector block coupled between the power receiver block and theresonant converter to detect a data signal of the battery pack throughthe transmission operation by means of the primary core block; a centralcontroller for controlling the power receiver block, the resonantconverter, the gate driver and the current detector block; and a displayblock for displaying a state of the wireless charger apparatus accordingto the control signal of the central controller.
 3. The wireless chargersystem according to claim 1, wherein the battery pack comprises: asecondary rectification circuit block for converting a power that isinduced through a secondary core block by an induced magnetic fieldgenerated by a primary core block of the wireless charger apparatus; abattery pack controller coupled to the secondary rectification circuitblock to supply a charging power to a battery cell, to process datatransmitted/received by the primary core block and the secondary coreblock and to transmit data signals for a charging state of the batterypack, an erroneous state of the battery pack and a native ID signalvalue; a battery pack charging circuit block for supplying power to thebattery cell, the power being supplied from the secondary rectificationcircuit block under the control of the battery pack controller, andsupplying a power of the battery cell to the portable terminal block; adata input/output block for transmitting/receiving data to/from aportable terminal block under the control of the battery pack controllerrelative to the data transmitted/received to/from the wireless chargerapparatus, and processing the data; and a charge monitoring circuitblock for checking a charging level of the battery cell and transmittinga fully-charged or discharged signal to the battery pack controller. 4.The wireless charger system according to claim 3, wherein the secondarycore block has a core formed in a shape selected from the groupconsisting of a round shape, a rectangular shape, an oval shape and apolygonal shape, wherein the battery pack is attachable/detachableto/from the portable terminal block and has an all-in-one hard packshape in which a power source stored in the battery cell is connected toa terminal block, wherein the secondary core block is formed integrallyin the rear of the portable terminal block and has a built-in shape inwhich a circuit configuration of the battery pack is configured insidethe portable terminal block together, or wherein the battery cell isformed in the battery pack and has a battery pack charging circuit blockcoupled through the terminal block, the battery pack charging circuitblock 34 being provided inside the portable terminal block.
 5. Thewireless charger system according to claim 1, wherein the display blockcomprises: a display signal receiver block for receiving a controlsignal transmitted from the central controller; a light emitting diode(LED), a liquid crystal display (LCD) panel and an icon LCD, all ofwhich are turned on according to the control signal transmitted from thecentral controller; an LED driver coupled to the display signal receiverblock to turn on the LED according to the control signal transmittedfrom the central controller; an LCD panel driver coupled to the displaysignal receiver block to turn on the LCD panel according to the controlsignal transmitted from the central controller; and an icon LCD drivercoupled to the display signal receiver block to turn on the icon LCDaccording to the control signal transmitted from the central controller.6. The wireless charger system according to any one of claims 1 to 5,wherein the battery pack comprises: a charge receiver module having asecondary core block coiled therein; shielding plates surrounding thebottom, the front, the rear and the left and right sides of the chargingbattery cell and made of Al, Cu, or Ni Alloy metals to protect thecharging battery cell from the magnetic field; a magnetic plate providedbetween the shielding plates and the charge receiver module andcontaining ferrites, Mn—Zn (50 parts by weight:50 parts by weight),Ni—Fe (80 parts by weight:20 parts by weight), or fine metals(Fe—Si—Cu—Nb) to induce an induced magnetic field into the secondarycore block; an insulating plate formed between the shielding plates andthe charging battery cell and formed of mesh made of NI—Cu or aninsulator to transfer heat of the shielding plates to the chargingbattery cell, the insulator being able to emit heat and decrease thermalconductivity; and a shielding member surrounding a wireless powerreceiver circuit of the battery pack including a battery pack controllerand a charging circuit block and including Al, Cu, or Ni Alloy metals toshield the magnetic field for the wireless power receiver circuit,wherein the magnetic plate includes an upper magnetic plate formedbetween the shielding plates and the charge receiver module; and a lowermagnetic plate disposed in a lower portion of the charge receivermodule.
 7. The wireless charger system according to any one of claims 1to 5, wherein the battery pack includes a magnetic plate that is aprimary shielding member and a shield mesh member that is a secondaryshielding member, both of the shielding members being formed between abattery cell case of the battery cell and the secondary core block, andthe magnetic plate and the shield mesh member contain ferrites, Mn—Zn(50 parts by weight:50 parts by weight), Ni—Fe (80 parts by weight:20parts by weight), or fine metals (Fe—Si—Cu—Nb) and the shield meshmember is formed in a mesh shape.
 8. A method for controlling a wirelesscharger system for battery pack solution, comprising a wireless chargerapparatus for receiving a power source from the outside to transmit apower signal via a charging power transmitter block in a wireless mode;and a battery pack for receiving a power signal from the wirelesscharger apparatus in a wireless mode to charge power in a battery celland supplying a power source to a portable terminal block, the methodcomprising: waiting for charging of an externally supplied power sourceby checking a state of the wireless charger apparatus prior toperforming a wireless charging through the charging power transmitterblock of the wireless charger apparatus; transmitting a call signal fornative ID of the battery pack to sense the battery pack through thecharging power transmitter block of the wireless charger apparatus;transmitting information on a native ID value and a state of the batterypack via the secondary core block of the battery pack by receiving acall signal of the native ID transmitted from the wireless chargerapparatus in the battery pack, the native ID value being stored in anative ID transmission block of the battery pack; determining the nativeID value of the battery pack transmitted from the battery pack and thestate of the battery pack; charging a power in the battery pack byreceiving a power via the charging power transmitter block of thewireless charger apparatus when the battery pack is ready to be charged;sensing a completely charged signal in the wireless charger apparatuswhen the completely charged signal is transmitted from the battery packin the step of charging the battery pack; and waiting for reception ofthe information on the charging level and the battery pack state fromthe battery pack by suspending a charging operation in the centralcontroller of the wireless charger apparatus when the information on thecompletely charged signal is received from the battery pack.
 9. A methodfor receiving a power signal in a receiver of a wireless charger system,wherein the system comprises a wireless charger apparatus whichgenerates a magnetic field, and the receiver magnetically coupled withthe wireless charger apparatus so that the power signal is receivedinductively by the receiver, the method comprising: receiving, from thewireless charger apparatus in a standby mode, an initial signal used bythe wireless charger apparatus to detect the presence of the receiver;transmitting, to the wireless charger apparatus in an ID call mode,information on a native ID of the receiver; receiving, in a chargingmode, the power signal transferred from the wireless charger apparatus;and transmitting, to the wireless charger apparatus, a data signalcomprising at least one of a charging state, an error state, and acompletely charged state of a battery.
 10. The method of claim 9,further comprising: rectifying the power signal into a DC power signal,wherein the DC power signal is supplied to the battery.
 11. The methodof claim 9, wherein the wireless charger apparatus differentiates, inthe standby mode, the receiver from a foreign substance.
 12. The methodof claim 9, further comprising: displaying the at least one of thecharging state, the error state, and the completely charged state of thebattery.
 13. A receiver for receiving a power signal in a wirelesscharger system, wherein the system comprises a wireless chargerapparatus which generates a magnetic field, and the receivermagnetically coupled with the wireless charger apparatus so that thepower signal is received inductively by the receiver, the receivercomprising: a secondary core block which receives, from the wirelesscharger apparatus in a standby mode, an initial signal used for thewireless charger apparatus to detect the presence of the receiver; anative ID transmission block which transmits, to the wireless chargerapparatus in an ID call mode, information on a native ID of the receiverin response to the initial signal; and a controller which transmits, tothe wireless charger apparatus, a data signal comprising at least one ofa charging state, an error state, and a completely charged state of abattery, wherein the secondary core block receives, in a charging mode,the power signal transferred from the wireless charger apparatus. 14.The receiver of claim 13, further comprising: a rectification circuitblock which rectifies the power signal into a DC power signal, and whichsupplies the DC power signal to the battery.
 15. The receiver of claim13, further comprising: a display block which displays the at least oneof the charging state, the error state, the completely charged state ofthe battery.
 16. A method for transmitting a power signal to a wirelesscharger apparatus of a wireless charger system, wherein the systemcomprises the wireless charger apparatus which generates a magneticfield, and a receiver magnetically coupled with the wireless chargerapparatus so that the power signal is transmitted inductively to thereceiver, the method comprising: detecting, in a standby mode, thepresence of the receiver by transmitting an initial signal to thereceiver; receiving, in an ID call mode, from the receiver, informationon a native ID of the receiver; transmitting, in a charging mode, thepower signal to the receiver; and receiving, from the receiver, a datasignal comprising at least one of a charging state, an error state, anda completely charged state of a battery.
 17. The method of claim 16,wherein the initial signal is transmitted continuously until thewireless charger apparatus receives an acknowledge response signal fromthe receiver.
 18. The method of claim 17, further comprising:differentiating the receiver from a foreign substance based on theacknowledge response signal.
 19. The method of claim 18, furthercomprising: when the foreign substance is detected, suspending thetransmitting of the power signal to the receiver.
 20. A wireless chargerapparatus for transmitting a power signal in a wireless charger system,wherein the system comprises the wireless charger apparatus whichgenerates a magnetic field, and a receiver magnetically coupled with thewireless charger apparatus so that the power signal is transmittedinductively to the receiver, the wireless charger apparatus comprising:a signal detector block which detects, in a standby mode, the presenceof the receiver by transmitting an initial signal to the receiver and byreceiving, in an ID call mode, from the receiver, information on anative ID of the receiver; a primary core block which transmits, in acharging mode, the power signal to the receiver; and a current detectorblock which receives, from the receiver, a data signal comprising atleast one of a charging state, an error state, and a completely chargedstate of a battery.
 21. The wireless charger apparatus of claim 20,wherein the signal detector block transmits the initial signalcontinuously until the signal detector block receives an acknowledgeresponse signal from the receiver.
 22. The wireless charger apparatus ofclaim 21, wherein the wireless charger apparatus differentiates thereceiver from a foreign substance based on the acknowledge responsesignal.
 23. The wireless charger apparatus of claim 22, furthercomprising: a central controller which, when the foreign substance isdetected, suspends the transmitting of the power signal to the receiver.24. A method for receiving a power signal at a receiver in a wirelesscharger system, wherein the system comprises a wireless chargerapparatus which generates a magnetic field, and the receivermagnetically coupled with the wireless charger apparatus so that thepower signal is received inductively by the receiver, the methodcomprising: detecting whether a voltage level of the power signalreceived from the wireless charger apparatus exceeds a reference voltagevalue or not; and transmitting, to the wireless charger apparatus, asignal which adjusts the power signal, wherein the signal comprises apower save code signal which reduces the power signal when the voltagelevel exceeds the reference voltage value, and receiving, from thewireless charger apparatus, a reduced power signal comprising aparameter which is changed from a parameter of the power signal based onthe power save code signal.
 25. The method of claim 24, wherein theparameter comprises a frequency, and the frequency is changed in amanner which reduces the power signal.
 26. The method of claim 25,wherein the frequency is changed by using a frequency automatic variablealgorithm.
 27. A receiver for receiving a power signal in a wirelesscharger system, wherein the system comprises a wireless chargerapparatus which generates a magnetic field, and the receivermagnetically coupled with the wireless charger apparatus so that thepower signal is received inductively by the receiver, the receivercomprising: a secondary core block which receives the power signal fromthe wireless charger apparatus; and a controller which detects whether avoltage level of the power signal exceeds a reference voltage value ornot, and which transmits, to the wireless charger apparatus, a signalfor adjusting the power signal, wherein the signal comprises a powersave code signal which reduces the power signal when the voltage levelexceeds the reference voltage value; wherein the secondary core blockreceives, from the wireless charger apparatus, a reduced power signalcomprising a parameter which is changed from a parameter of the powersignal based on the power save code signal.
 28. The receiver of claim27, wherein the parameter includes a frequency and the wireless chargerapparatus changes the frequency in a manner which reduces the powersignal.
 29. The receiver of claim 28, wherein the wireless chargerapparatus changes the frequency by using a frequency automatic variablealgorithm.
 30. A method for transmitting a power signal to a wirelesscharger apparatus in a wireless charger system, wherein the systemcomprises the wireless charger apparatus which generates a magneticfield, and a receiver magnetically coupled with the wireless chargerapparatus so that the power signal is transmitted inductively to thereceiver, the method comprising: transmitting the power signal to thereceiver using the magnetic field; receiving a signal which adjusts thepower signal from the power receiver, wherein the signal comprises apower save code signal which reduces the power signal when a voltagelevel in the power receiver exceeds a reference voltage value; andchanging a parameter which induces the magnetic field based on the powersave code signal.
 31. The method of claim 30, wherein the parametercomprises a frequency and the frequency is changed in a manner whichreduces the power signal.
 32. The method of claim 31, wherein thefrequency is changed by using a frequency automatic variable algorithm.33. A wireless charger apparatus for transmitting a power signal in awireless charger system, wherein the system comprises the wirelesscharger apparatus which generates a magnetic field, and a receivermagnetically coupled with the wireless charger apparatus so that thepower signal is transmitted inductively to the receiver, the wirelesscharger apparatus comprising: a primary core block which transmits thepower signal to the receiver using the magnetic field, wherein thewireless charger apparatus is which receives, from the power receiver, asignal which adjusts the power signal, wherein the signal comprises apower save code signal which reduces the power signal when a voltagelevel in the power receiver exceeds a reference voltage value, and whichchanges a parameter which induces the magnetic field based on the powersave code signal.
 34. The wireless charger apparatus of claim 33,wherein the parameter comprises a frequency and the wireless chargerapparatus changes the frequency in a manner which reduces the powersignal.
 35. The wireless charger apparatus of claim 34, wherein thewireless charger apparatus changes the frequency by using a frequencyautomatic variable algorithm.